77812-20-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77812-20-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,8,1 and 2 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 77812-20:
(7*7)+(6*7)+(5*8)+(4*1)+(3*2)+(2*2)+(1*0)=145
145 % 10 = 5
So 77812-20-5 is a valid CAS Registry Number.